Winding mechanism



Dc. 10, 1935. Q Q MccAlN Erm..

WINDING MEGHNISM Filed May 2l, 1934 -8 Sheets-Sheet l Dec. 10, 1935- c.c. MccAlN Er AL.

WINDING MECHANISM 8 Sheets-Sheet 2 @KWUN Dec; l0, 1935. c. c. MecAlN ErAL WINDING MECHANI SM 10, 1935. c. c. MecAlN Er AL WINDING MECHANISM 8Sheets-Sheet 4 Filed May 2l, 1934 Dec 10, 1935- c. c. MccAlN ET AL.

WINDING MECHANISM Filed May 2l, 1 954 8 Sheets-Sheet 5 .0 y. mi Qi# .W?@HM l 2 Fm @a Jed c. c. M ccAlN Er AL.

WINDING MECHANISM Filed May 2l, 1934 Sheets-Shet '7 mmm.

c. c. MCCAIN Er AL 2,023,430

wINDING MEcHANIsM v A Filed May 21, 1954 8 sheets-sn et 8 21 Z ZZ *T 52420 lll/lll,

Patented Dec. 10, 1935 UNITED STATES PATENT OFFICE WINDING MECHANISMWest Virginia.

Application May 21, 1934, Serial No. '726,710

18 Claims.

This invention relates to mechanism for unwinding a band, or theequivalent, from one spindle, or the equivalent, to a second spindle andthen rewinding the band, or the equivalent, on the inst-mentionedspindle.

The invention is particularly adapted to be -embodied in duplicatingmachines of the hectograph type where the hectograph band is advancediro-m one spindle to a second spindle over a platen or bed plate, theband being rewound upon the firstmentioned spindle of the hectographmachine whenever it is so desired.

A feature of several forms of the invention is the provision ci windingand rewinding means operable by a handle which is always rotated in thesame direction whether the hectograph band is being wound upon a spindleor being rewound thereon.

The objects and advantages of the invention vill become .apparent fromthe following description, reference being had to the accompanyingdrawings, whereinl is a plan View of a hectograph machine whichcomprises winding means embodying the invention.

Fig. 2 is a side elevation of the machine shown in Fig. l.

Fig. 3 is an enlarged section taken on line 3-3 oi Fig. 2.

Fig. i section taken on line 4-4 of Fig. 6. Fig. 5 is a section taken online 5 5 of Fig. 4. Fig. 6 is a section taken on line 6-6 of Fig. 1. 7is a section taken on the same line as F11. S but showing certain partsof the Winding hanism in changed positions.

8 is a section taken on the same line as Fig but showing certain partsof the Winding mechanism in changed positions.

Fig. 9 is a section taken through a duplicating machine which hasWinding means embodying another form of the invention.

Fig. 9A is a section taken on line SA-SA of Fig. 9.

Fig. 10 is a View similar to Fig. 9 but illustratcertain parts ci thewinding mechanism in changed positions.

Fig. 11 is a view similar to Fig. 9 but showing certain parts of thewinding mechanism in changed positions.

Fig. 12 is a fragmentary section taken on substantially the same linesas Fig. 9 but showi-ng certain parts in section.

Fig. i3 is a fragmentary section taken on the same line as Fig. 12 butshowing certain parts in changed positions.

Fig. 114 is a section taken on line Ylll of Fig. 12.

Fig. 15 vis a section taken on line l5--I5 of Fig. 1'3.

Fig. 116 is a section taken on line lli-I6 of Fig. 9. 5 Fig. 17 is asection taken through winding mechanism which embodies another form ofthe invention.

Fig. 17A is an enlarged section taken on the line lflA-llAof Fig. 17. 10Fig. '18 is a section taken substantially on the same line as Fig. 17but showing certain parts of the winding mechanism in changed positions.

Fig. 19 .is a section taken on substantially the same line as Fig. 18but showing some parts oi 15 the winding mechanism in changed poitions.

Fig. 420 is a section taken through the duplicating machine providedwith Winding mechanism embodying still another form of the invention.

Fig. 21 is a section taken on line 2l--2l of 20 Fig.'24. Fig. 22 is Eaysection taken 4on line 22-22 of Fig. 21.

Fig. 23 is a section taken on line 23-23 of Fig. '20. 25

Fig. 24 is a section taken on line 24-24 of Fig. 21.

Figs. 25 and 26 are fragmentary sections taken on the same -l-ine asFig. 24 but showing certain parts in changed positions, and 30 Fig. 2*-7is a fragmentary section illustrating a modiication of 'the mechanismshown in Figs. 25 and 26.

Referring Stor the present to Figs. 1 to 8, inclusive, r4'wherein -apreferred embodiment of the 35 invention is illustrated, the referencecharacter IG :designates generally the frame of a duplicating machine ofthe hectograph type. The machine fis provided with a hectograph band Ilwhich has its -ends -detachably secured tc spindles 4o l2 and i3 `at thebackend front ends oi the frame l 0,1espectively. The spindles l2 and I3are pre1"- erably .identical .in construction and are removabi-y mountedin the frame. In Fig. 3, the means for mounting the front .spindle I3isillustrated 45 and as .the rmeans for mounting the spindle l2 is o'fsubstantially identical construction, a description ofthe means formounting the spindle i3 will 'be sufficient for the purposes of thisdisclosure. I1; will be `noted that, in this instance,`5o the spindlevI3 'comprises a tubular body portion I5 which has its ends closed byvcaps I6 and Ilia of identical construction, the ends vof the spindlebeing interchangeable rin connection with the means for mounting them.The caps lt and I6a 55 CFI are provided with concave recesses I'I, therecess I'I of the cap I 6a being journaled on a convex surface I8provided upon one end of a pin I9 which is slidably journaled in abracket 20 fixed to the frame I0, A spring 22 yieldingly urges the pinIS against the cap IIa, the movement of the pin I9 in this directionbeing limited by a pin 23. The caps I6 and IGa are provided withrectangular slots 25 in the bottom portions of the recesses II. The slot25 of the cap I6 is engaged by a tongue 2'I of a stub shaft 28 which isjournaled in the frame I0 and is constrained to rotate with the spiralgear 29. The means for operatively connecting the gear 29 to the stubshaft 28 comprises a pin 30 which projects through the shaft 28 andengages slots 3I in a hub 32 formed integral with the gear 29. Theconstruction is such that while the shaft 28 is constrained to rotatewith the gear 29, it may be displaced longitudinally without causinglike displacement of the gear 29. The shaft 28 is urged yieldinglytoward the cap I 6 by a spring 34. A knob 35 secured to the outer end ofthe shaft 28 provides means whereby the operator may displace the shaft28 to the left (Fig. 3) against the action of the spring 34 so that thetongue 21 will be withdrawn from the slot 25. When the tongue 2`I iswithdrawn from the slot 25, it is obvious that the spindle I3 may beremoved from the machine. As stated above, similar mechanism is providedfor journaling the spindle I2. Thus, in Fig. 1, a knob 35a is shown, theknob 35a having the same function as a knob 35 and providing meanswhereby the spindle I2 may be released from the machine. In Figs. 2, 6,7 and 8, the shaft associated with the spindle I 2 and corresponding tothe shaft 28 is designated by the reference character 28a.

The hub 32 of the gear 29 is journaled in a sleeve 49 mounted in theframe I 0.

The gear 29 meshes with a spiral gear 43 formed integral with anelongated tubular hub 44 which is rotatably journaled on sleeves 45 and46 m'ounted in a housing 41 fixed to the frame I9 by bolts 48. Rotatablyand slidably journaled in the sleeves 45 and 46 and in sleeves 45a and46a:

is a shaft 59. The sleeves 45a and 45a are mounted in a housing 41a xedto the frame I9 by bolts 48a. Rotatably journaled on the Sleeves 45a and49a is an elongated tubular hub 52 which has a spiral gear 53 formedintegral With it. Meshing with the gear 53 isa spiral gear 54 with whichthe shaft 28a is constrained to rotate. The means for constraining theshaft 28a to rotate with the gear 54 comprises a pin 39a which has thesame function as the pin 39 and rides in slots 3Ia cut in a hub 55formed integral with the gear 54.

It will be readily understood that if the gear 29 is rotated in aclockwise direction (Fig. 6) while the gear 54 is free to rotate, thehectograph band will be unwound from the spindle I2 onto the spindle I3.Also, if the gear 54 is driven in a counter-clockwise direction (Fig. 6)while the gear 29 is free to rotate, the hectograph band will be unwoundfrom the spindle I3 and wound upon the spindleV I2. And it will also beunderstood that if the gears 29 and 54 are driven in clockwise andcounter-clockvvise directions, respectively, the lectograph band will bedrawn taut over a platen or bed 60 forming part of the frame I0. Asindicated in dotted lines in Fig. 2, the hectograph band II extends fromthe spindle I2 over the platen 60 to the spindle I3.

The forward end of the shaft 5I) is provided with a hub 52 comprisingthree handles 53, 64 and 65 whereby it may be manipulated by theoperator. Three annular grooves 66, B'I and 68 are provided in the shaft59 adjacent its forward 5 end. A ball 'I8 is engageable with the grooves85, 5l and B8, the ball being yieldingly urged toward the shaft 58 by aspring 7i mounted in a bracket I2 xed to the housing 47. The tension ofthe spring i may be adjusted by a screw 10 'I3 screw-threaded into thebracket l2. It will be readily understood that the ball 'i8 will engagethe grooves 66, 6i and G8 and retain the shaft 58 yieldingly in thepositions wherein it is shown in Figs. 6, '7 and 8. 15

Means is provided for operatively connecting the shaft 59 to the tubularhubs 44 and These means comprise overrunning clutches 'I5 and i6,respectively. The clutches I5 and EE are identical in construction and adescription of the 20 clutch 'I5 will be sufficient for the purposes ofthis disclosure. The clutch 75 is illustrated in detail in Figs. 4 and5. It will be noted that the clutch l5 comprises balls 'I disposedaround the shaft 523 and riding thereon. rlhe balls 'i8 are 25 retainedapproximately in the positions wherein they are illustrated in Fig. 4,by a cage 79 having slots 8U which accommodate the balls. The cage 'i9is provided with integral prongs 8i which engage grooves 82 formed inthe tubular hub 44. 30 The balls ES engage cam surfaces 84 formed in thetubular hub 44 and springs 85 yieldingly urge the balls 'it intopositions wherein they will cause the hub 44 to rotate with the shaft 59when the shaft 59 is rotated in a clockwise direction (Fig. 4). 35 Ifthe shaft 5G is rotated in a counter-clockwise direction (Fig. 4) thesprings 85 will yield and the balls 'I8 will be displaced in acounter-clockwise direction (Fig. 4) along the cam surfaces 84 in suchmanner that the hub 44 will not rotate 40 with the shaft 50.

It will be noted that the shaft 5i! is provided with annular grooves 88and 89 associated with the clutches i5 and i4, respectively. Theconstruction is such that when the shaft is dis- 45 placed from thepositions wherein it is shown in Figs. 6 and 7 to the positions whereinit is shown in Fig. 8, the groove 88 will be alined with the balls 'P8of the clutch l5 and rotation of the shaft 59 in either direction willnot drive the huh 50 44. Similarly, when the groove 89 is alined withthe balls of the clutch 75, rotation of the shaft 59 will not drive thehub 52. However, if the gear 29 is driven by the band II when the groove88 is alined with the balls of the clutch T5, the 55 gear 29 will drivethe spiral gear 4S and the hub 44, but this rotation of the hub 44 willnot be imparted to the shaft 59. Likewise, if the gear 54 is driven bythe band II when the groove 89 is alined with the balls of the clutch75, the gear 60 53 and the hub 52 will be rotated but this rotation ofthe hub 52 will not be imparted to the shaft 55.

The operation of the apparatus shown in Figs.

1 to 8, inclusive, is substantially as follows: Assuming that theoperator wishes to advance the 65 hectograph band I I over the platen EGto provide a fresh duplicating surface, it is only necessary to displacethe shaft 5) longitudinally until the ball 'I9 engages the groove 55 asillustrated in Fig. 6. Then if the shaft 59 is rotated in a clock- 70wise direction (Fig. 4) the clutch i5 will drive the hub 44 and the gear43 and the gear 4S will, in turn, drive the gear 2S. The gear 2S willdrive the shaft 28 in a clockwise direction (Fig. 6) and the shaft willrotate the spindle I3 in the same 75 Fig. 11 so that the hub [0 and theclutch |30 will be displaced to the left (Fig. 11). The lever |45 isheld in the position wherein it is shown in Fig. l1 during the rewindingoperation. It will be noted that the groove |34 is then alined with theclutch |30 and rotation of the shaft l5 in the direction of the arrow|31 will not cause the clutch |30 to drive the hub H0.

As best shown in Figs. 9 and 9A, the handle |41 is provided with a ball|41a which rides in a bore |41b formed in the handle |41. A spring |41cyieldingly urges the ball |6161 to the right (Fig. 9A). The ball |41a isadapted to engage two depressions |41d and |41e formed in a plate |411fixed to the frame |00. When the ball |41a engages the depression |41d,the lever |45 is retained yieldingly in the position wherein it isillustrated in Fig. 9. When the ball |41@ engages the depression |41e,the lever |45 is retained yieldingly in the position indicated in Fig.11. The spring |41c yields readily when the operator displaces the lever|45 from one position to the other.

Secured to the front wall of the housing |23 is a cam member |50 whichco-operates with a cam member 5| rotatably journaled on the shaft ||5(Figs. 12 to 15, inclusive). The cam members |50 and i5! are providedwith co-operating cam surfaces |52 and |53, respectively, which are ofsuch conformation that the cam members may nest in the mannerillustrated in Fig. 12. Also, the cam surfaces |52 and |53 are of suchconformation that if the cam member |5| is displaced by rotating thelshaft ||5 through 90 in a direction opposite to that indicated by thearrow |31, the cam member |5| will ride up on the cam member |56 so thatthe cam member |5| will be displaced to the right (Figs. 12 and 13),which displacement will be accompanied by a like displacement of theshaft 5 as the shaft |i5 is operatively connected to the cam member |5|by a pin |55 which projects from a hub |56 into an annular groove |51formed in the shaft 5. The hub |56 is formed integral with the cammember |5|. The cam members |50 and |5| are provided with teeth |59 and|60, respectively, which engage each other when the cam members are inthe position wherein they are illustrated in Fig. 13. It will be notedthat when the cam members are in the positions wherein they areillustrated in Fig. 13 the teeth |59 and |60 pre? vent the cam member|5| from being displaced in the direction indicated by the arrow |62(Fig. 13. However, the teeth |59 and |60 do not prevent rotation of thecam member |5| in the direction opposite to that indicated by the arrowThe handle I6 is splined to the shaft ||5 by a key |65. The handle H6 isprovided with an enlarged hollow hub |66, the hub |66 being providedWith an outwardly extending flange |61 disposed between the frame |00and a ring |69 secured to the frame |00 by screws |10 (Figs. 12 and 13).The ring |69 permits the hub |66 to rotate around the longitudinal axisof the shaft 5 but prevents displacement of the hub |66 and the handlei6 in directions toward or away from the frame |00.

Pivoted on a pin |13 fixed in the hub |66 is a pawl |14 which isengageable with a ratchet |15 formed integral with the hub |56 and,therefore, with the cam member 5| The operation of the apparatus shownin Figs. 9 to 16, inclusive, is as follows: When the band |06 is to bewithdrawn from the back spindle (not shown) and wound upon the frontspindle (not shown), the apparatus is adjusted as illustrated in Fig. 9.The operator then rotates the handle ||6 and the shaft ||5 in thedirection indicated by the arrow |31. In other words, if thev machine isviewed from the front thereof, the operator rotates the handle i6 andthe shaft l i5 in a clockwise direction. Such rotation of the shaft ||5causes the clutch |39 to drive the hub ||0 and the gear |08 so that thegear I0! is ro- 10 tated in a clockwise direction (Fig. 9). As thegroove |35 is then alined with the clutch |3 the back spindle, the shaft|05, the gear |02 and the gear |09 rotate yieldingly and permit the band|06 to be unwound from the back spindle and 15 wound upon the frontspindle. When the handle 6 is rotated in the direction of the arrow |31,the pawl |14 simply rides over the teeth of the ratchet |15 as the pawlis rotated bodily in a clockwise direction (Fig. 14) around the longi-20 tudinal axis of the shaft ||5.

After the hectograph band I6 has been advanced the desired distance, theoperator rotates the handle ||6 and the shaft ||5 in a directionopposite to that indicated by the arrow |31 and 25 through an angulardistance of or more, whereupon, the pawl |14 engages a tooth of theratchet |15 and causes it to rotate the ratchet and the cam member |51through the same angular distance so that the cam |5| rides up on the 30cam |56 as illustrated in Fig. 13. The apparatus is then adjusted asillustrated in Fig. 10 so that when the operator rotates the shaft ||5in the direction indicated by the arrow 31, the clutches |30 and ISIwill drive the hubs |50 and |||.35 The gears |08 and |06 will then drivethe gears 10| and |02 in clockwise and counter-clockwise directions,respectively, so that the band |05 will be stretched taut over theplaten of the duplieating machine. Of course, the spiral gears |0I, 40|02 and |08 and. |69 function as locking means when the operator ceasesto rotate the handle i6 and lock the back and front spindles againstrotation in either direction until the shaft ||5 is rotated again. Thesimilar spiral gears of the 45 apparatus shown in Figs. 1 to 8,inclusive, function in the same manner. It will be noted that the shaft||5 has been displaced to the right in Fig. 10 and that the spring E40has been compressed. 50

When the operator desires to rewind the band upon the back spindle ofthe duplicating machine, the apparatus is adjusted as shown in Fig. 11.The operator moves the lever |41 into the position wherein it is shownin Fig. 11 so that the 55 groove |34 is alined with the clutch Then whenthe handle ||6 and the shaft H5 are rotated in the direction of thearrow |81, the clutch |3| rotates the hub and the gear |09 in the samedirection so that the gear |02 rotates in a 60 counter-clockwisedirection (Fig. l1). lThis rotation of the gear |62 causes the backspindle (not shown) to wind the band |96 around it.

If the operator subsequently desires to advance the band to the frontspindle (not shown), the handle H6 and the shaft |15 are rotated in adirection opposite to the direction indicated by the arrows |31 and |62(Figs. 9 and 13, respectively) and the cam member |5| is displaced 70through an angle of 90 so that the spring |40 will displace the shaft||5 te the left (Fig. 11) and nest the cam members |50 and I5! so thatthey will assume the positions wherein they are illustrated in Fig. 12.Of course, the lever |45 75 is returned to the position wherein it isshown in Fig. 9.

Referring now to Figs. 17 to 19, inclusive, wherein another form of theinvention is illustrated, the reference character 200 designates aduplicating machine which, with the exception of the mechanism forwinding and rewinding the hectograph band, is identical in constructionwith the duplicating machine illustrated in Figs. l and 2. The gears 25iand 222 shown in Figs. 17 to 19, inclusive, correspond to the gears 29and 54, respectively, and are connected to the front and back spindles,respectively, of the duplicating machine illustrated diagrammatically inFigs. 17 to 19, inclusive. The means for connecting the gearsy 29| and292 to the front and back spindles (not shown) is identical with thesimilar means in Figs. 1 to 8, inclusive, and need not be illustrated ordescribed in detail.

The gears 29| and 202 mesh with spiral gears 201i and respectively,which are provided with elongated hubs 256 and 201, respectively. Thegears 255, 292, 224 and 255 are disposed within housings 299 and 2|0secured to the frame 250, the housing 229 being associated with thegears 2i and 224 at the front end of the machine. Sleeves 2|2, 2|5, 2|3and 2|1 are fixed in the housings 29 and 2|il, respectively, androtatably and slidably journal a shaft 2|5.

Splined to the forward end of the shaft 2|5 is a handle member 220 whichis preferably identical with the handle member H5 shown in Figs. 9 toil, inclusive. A bifurcated member 22| fixed to the frame 205 engages agroove 222 formed in a hub 223 formed integral with the handle member225. The bifurcated member 22| prevents the handle 229 from' beingdisplaced away from or toward the frame 259.

Disposed in the hubs 205 and- 291v are overrunning clutches 225y and225, respectively, which are identical in construction with the clutchdevices 15 and 15 described above. Annular grooves 228 and 229 formed inthe shaft 2|5 are associated with the clutch devices 225 and 225,respectively. The construction is such that if the grooves 228 and 229are not alined with the clutch devices 225 and 225, respectively, whenthe shaft 2 i 5 is rotated in the direction indicated by the arrows 239(Figs. 17, 18 and 19) the clutch devices will drive the hubs 295 and 221in the same direction. However, if the annular groove 222 or 229 isalined with its associated clutch device when the shaft 2|5 is rotatedin the direction indicated by the arrows the clutch device 223 or 229having its asscciated groeve alined with it will be functionallyinoperative and will not drive the corresponding gear or 295. Rotationof the shaft 2|5 in a direction opposite to that indicated by the arrows259 will not cause the clutch devices 225 to drive the gears 294 and205, respectiveiy.

A collar 229 rotatably journaled on the shaft 255 is held againstrelative displacement longily of the shaft by collars 25| and 242 whichpi.-ned to the shaft 2 l5. Pins 254 projecting the collar .225 ride inslots 2F15 provided in the bifurcations of a bifurcated lever 241 whichis pivoted intermediate its ends by a pin 248 projecting from the frame222. The lever 241 is provided with a handle 229 whereby the operatormaf,7 displace it around the pin 248.

As best illustrated in Fig. 17A the lever 241 is provided with a boss259 having a recess 25| in which a ball 252 is slidably journaled. A

spring 253 disposed in the recess 25| yieldingly urges the ball 252toward a boss 255 formed upon the frame 200. Thev boss 255 is providedwith three recesses 255, 251 and 258 engageable by the ball 252 when theball 252 engages one of the recesses 256, 251 or 258 to yieldinglyretain the lever 241 in that position.

The operation of the apparatus illustrated in Figs. 17 to 19, inclusive,is as follows: Assuming that a'hectograph band 255 is to be unwound fromthe back spindle (not shown) and wound upon the. front spindle (notshown), the apparatus is adjusted as shown in Fig. 17 sothat the ball252 engages the recess 258 and the groove 22S is alined with the clutchdevice 226. The operator then rotates the handle 220 and the shaft 2|5in the direction indicated by the arrows 235 whereupon the clutch device225 drives the gear 204' through the hub 206. The gear 254 drives thegear 20| in a clockwise direction (Fig. 17) and the gear 2| rotates thefro-nt spindle (not shown) so` that the hectograph band 250 is withdrawnfrom the back spindle (not shown) and rewound upon the front spindle(not shown). During this operation, the gears 202 and 205 are free torotate as the clutch device 225 is functionally inoperative.

After the operator has advanced the hectograph band the desireddistance, the lever 241 is displaced until the ball 252 engages therecess ai 251, whereupon the apparatus will be adjusted as illustratedin Fig. 18. It will be noted that in Fig. 18, the grooves 228 and 229are not alined with the clutch devices 225 and 225, respectively. Whenthe operator then rotates the shaft 2|5 in the direction indicated bythe arrows 230, the clutch devices 225 and 2251 rotate the gears 294 and205 so that the gears 29| and 202 will be rotated in clockwise andcounter-clockwise directions, respectively, (Fig. 18). This operationwill stretch the band 265 taut across the platen of the hectographmachine. When the operator ceases to rotate the shaft 2|5, the helicalgears 25|, 254, 202 and 255 will serve as locking means to prevent thespindles (not shown) from unwinding the hectograph bands.

When the operator desires to rewind the hectograph band 250 upon theback spindle (not shown) associated with the gear 202, the lever 241 isdisplaced so that the ball 252 engages the recess 255. rIhe apparatus isthen adjusted as illustrated in Fig. 19 so that the clutch device 225 isfunctionally inoperative when the shaft 2|5 is rotated in the directionof the arrows 230. The operator then rotates the handle 220 and theshaft 2|5 in the direction of the arrows 239 and the clutch device 225rotates the hub 201 and the gear 205. The gear 205 then rotates the gear292 in a counter-clockwise direction (Fig. 19) so that the hectographband 260 is withdrawn from the front spindle (not shown) and rewoundupon the back spindle (not shown).

Still another form of the invention is illustrated in Figs. 20 to 26,inclusive. Referring first to Fig. 2l), the reference character 300designates generally the frame of a hectograph machine which, with theexception of the mechanism for winding and rewinding the hectographband, is substantially identical in construction with the hectographmachine shown in Figs. 1 and 2. The winding and rewinding mechanismcomprises gears 30| and 392 which correspond to the gears 29 and 54,respectively, of the winding and rewinding mechanism illustrated inFigs. l to 8, inclusive. The gears 30| and 302 are operatively connectedto the front and back spindles, (not shown) respectively, by mechanismwhich is identical with the mechanism by which the gears 29 and 54 areconnected to the back and front spindles of the machine shown in Figs. 1to 8, inclusive, therefore it is not necessary to give a furtherdescription of this mechanism. The gears 30| and 302 mesh with spiralgears 304 and 305, respectively, the gear 305 being pinned to a shaft306 and the gearV 304 being pinned to a sleeve 301 which is rotatablyjournaled on the shaft 306 and in a housing 308. The housing 308encloses the gears 30| and 304. A similar housing 3|0 encloses the gears302 and 305. The back end of the shaft 306 is journaled in the housing3I0.

As best shown in Fig. 24, the hub 3H of a ratchet 3I2 is pinned to theforward end of the sleeve 301. A second ratchet 3 I3 is splined to theshaft 306 by a key 3I4. A hand wheel 3I5 is rotatably journaled on a hub3I1 formed integral with the ratchet 3|3. A collar 3|9 pinned to the hub3|1 prevents displacement of the ratchet 3|3 longitudinally of the handwheel 3I5. The hand wheel 3 I 5 is provided with a boss 320 from which ahandle member 32 I projects, the handle member 32| being provided with acylindrical boss 322 which is slidably and rotatably journaled in theboss 320. Formed integral with the boss 322 is a pin 323 provided withcam members 324 and 325. The cam members 324 and 325 are provided Withfrustro-conical cam surfaces 326 and 321, respectively. The cam surfaces326 and 321 cooperate with pawls 329 and 330, the pawl 329 beingengageable with the ratchet 3|3 and the pawl 330 being engageable withthe ratchet 3I2. Springs 332 and 333 yieldingly urge the pawls 329 and330, respectively, toward the ratchets 3|3 and 3I2, respectively.Disposed around the pin 323 and interposed between the cam member 324and a shoulder 335 formed in the boss 320, is a spring 331 whichyieldingly urges the cam members 324 and 325 to the left (Figs. 24, 25and 26). When the parts are adjusted as illustrated in Fig. 24, thecylindrical boss 322 of the handle member 32| abuts against a shoulder338 formed in the boss 320, these parts being held in these relativepositions by the spring 331.

As best illustrated in Figs. 23 to 26, inclusive, a bell crank lever 340is pivoted to the boss 320 by a pin 34 I. The bell crank lever 340comprises arms 342 and 343 which are accommodated in a slot 344 formedin the boss 320. The frame 342 is provided with a nger piece 346. Aspring 348 yieldingly urges the bell crank lever 340 in a clockwisedirection (Fig. 23). The arm 342 has a latch portion 350 adapted toengage either side of an annular iiange 35| forming part of thecylindrical boss 322. It will be noted that the bell crank lever 340 maybe displaced from the position wherein it is shown in full lines in Fig.23 to the position wherein it is shown in dotted lines in the samefigure so that the latch portion 350 will be withdrawn from the path ofthe annular flange 35|.

The operation of the apparatus illustrated in Figs. 20 to 26, inclusive,is as follows: Assuming that the operator wishes to advance thehectograph band 355 from the back spindle (not shown) to the frontspindle (not shown) the apparatus is adjusted in the manner illustratedin Fig. 24. The operator then rotates the hand wheel 3I5, through themedium of the handle member 32|, in a clockwise direction (Fig. 21) sothat the pawl 330 will rotate the ratchet 3I2,

. the sleeve 301 and the gear 304 in the same direction. Such rotationof the gear 304 will cause it to rotate the gear 30| in a clockwisedirection (Fig. 20) so that the hectograph band 355 will be withdrawnfrom the back spindle (not shown) and wound upon the front spindle (notshown).

The shaft 306 will not be rotated by the hand wheel 3I5 during thisoperation, but it will be rotated in a counter-clockwise direction (Fig.21) through the mediiun of the gears 302 and 305 A which will be rotatedas the back spindle (not shown) is rotated by the withdrawal of thehectograph band therefrom. Of course, the ratchet 3|3 will rotate in acounter-clockwise direction with the shaft 306 during this operation.

When the hectograph band 355 has been advanced the desired distance, themechanism may be adjusted for the stretching operation by pulling thehandle member 32| into the position wherein it is shown in Fig. 25against the action of the spring 331. It will be noted that in Fig. 25the ange 35| abuts the left hand side of the bell crank lever 340 and itwill also be noted that the cam surfaces 326 and 321 are disposed inpositions wherein they permit the pawls 320 and 330 to engage theratohets 3|3 and 3|2, respectively. During the stretching operation, theoperator retains the handle member 32| in the position wherein it isillustrated in Fig. 25 while the hand wheel 3I5 is being rotated in aclockwise direction (Fig. 2l). A partial turn of the hand wheel 3i5causes the ratchet members 3|3 and 3I2 to drive the sleeve 301 and theshaft 305 in a clockwise direction (Fig. 21). The gears 30| and 302 arethen driven in clockwise and counter-clockwise directions, respectively,(Fig. 20) to stretch the band. When the band has been stretched thedesired amount, the operator simply releases the handle member 32|,whereupon it returns to the position wherein it is shown in Fig. 24 andmay be utilized directly thereafter to again advance the hectographband.

When the operator desires to rewind the hectograph band 355 upon theback spindle (not shown), the bell crank lever 340 is first brought intothe dotted line position wherein it is illustrated in Fig. 23 and thehandle member 32| is brought into the position wherein it is shown inFig. 26. The lever 340 is then returned to its initial position so thatthe spring 331 will hold the flange 35| against the right side (Fig. 26)of the lever 340. When the parts are arranged as in Fig. 26, the pawl330 is held in a position wherein it can not engage the ratchet 3I2, thepawl 329 being in engagement with the ratchet 3|3. During lthe rewindingoperation, the operator simply revolves the hand wheel 3| 5 in aclockwise direction (Fig. 2l) which will cause the ratchet 3|3 to rotatethe shaft 306 in a clockwise direction (Fig. 2l). Such rotation of theshaft 306 will cause the spiral gear 305 to rotate the gear 302 and theback spindle (not shown) in a counter-clockwise direction (Fig. 20) Theback spindle (not shown) will then withdraw the band 355 from the frontspindle (not shown) and wind the band upon itself. During thisoperation, the gears 30| and 304, as well as the ratchet SI2, are freeto rotate. After the rewinding operation, the handle member 32| may berestored to the position wherein it is illustrated in Fig. 24 whereuponit may be utilized to advance the gelatin band as desired to the frontspindle (not shown).

In Fig. 27, alternative construction is shown for the hand wheel 3I5 andthe handle member 32| In Fig.. 27 the handle member is designated by thereference character 32|a and the hand wheel is designated by thereference character 3 i 5a. The handle member 3210, is provided with apin 523m which is slidably and rotatably journaled in a boss 32h61.formed integral with the hand wheel 3 l 5a. The pin 323a is providedwith earn surfaces 326e and 32'la which correspond to the cam surfaces326 and 321, respectively, and co-operate with pawls 3296i and 3Std. Thepawls 3Std and Stilo. co-operate with the ratchets 3|3a and ti l 2a,respectively, which have the same functions as the ratchets 3I3 and SI2.

The pin 3 5a has three annular grooves 400, 40| and to2 engageable by aball 405 slidablyy journaled in. a bore it formed in the boss 320d. Aspring d68 disposed in the bore yieldingly urges the ball toward the pin323a. The tension of the spring stt may be adjusted by a set screw 4 lt. .it will be readily understood that when the ball @35 engages one ofthe grooves 480, 40! or 4132, the ball will yieldably retain the pin323a in that position. The construction is such that when the ball istengages the groove 402, the hand wheel @55a may be rotated to advancethe hectograph band to the front spindle (not shown). When the ballliili engages the groove 401, the hand wheel 355e may be rotated tostretch the hectograph band and when the ball 4&35 engages the grooveddii, the hand wheel 3l5a may be rotated to rewind the hectograph bandupon the back spindle (not shown). In each instance, the hand wheel tibois rotated in the same direction.

While we have shown and described certain embodiments of our invention,it is to be understood that it is capable of many modifications.Changes, therefore, in the construction and arrangement may be madewithout departing from the spirit and scope of the invention asdisclosed in the appended claims, in which it is our intention to claimall novelty inherent in our invention as broadly as permissible, in viewof the prior art.

We claim:

l. Apparatus for unwinding a band from either of two spindles, or theequivalent, and winding it upon the other, said apparatus comprising arotatable member, means operatively connecting said rotatable member toone of said spindles to wind the band thereon when said rotatable mem.-ber is rotated in a predetermined direction, and means operativelyconnecting said rotatable member to the other of said spindles to windthe band thereon when said rotatable member is rotated in saidpredetermined direction, and control means for both the aforesaid meansoperable to cause them to simultaneously connect both said spindles tothe rotatable member, whereby rotation of said member draws the bandtaut between said spindles.

2. Apparatus for unwinding a band from either of two spindles, or theequivalent, and winding it upon the other, said apparatus comprising ashaft, gears with which said spindles are constrained to rotate, gearson saidshaft meshing with the first-mentioned gears, and meanscontrolling said gears to cause them to wind the band upon one of saidspindles when said shaft is rotated in a predetermined direction and forcausing said gears to wind the band on the other of said spindles whensaid shaft is rotated in said predetermined direction said meansincluding mechanism for causing said gears to turn both spindles fromsaid shaft at once.

3. Apparatus for unwinding a band from either of two spindles, or theequivalent, and winding it upon the other, said apparatus comprising ashaft, gears with which said spindles are constrained to rotate, gearson said shaft meshing with the first-mentioned gears, and overrunningclutches operatively connecting said gears on said shaft to said shafttogether with control means for simultaneouslyrendering both cutchesoperative to connect their respective gears to the shaft to draw theband taut between said spindles upon further rotation of said shaft.

4. Apparatus for unwinding a band from either of two spindles, or theequivalent, and winding it upon the other, said apparatus comprising agear with which one of said spindles is constrained to rotate, a secondgear with which the other of said spindles is constrained to rotate, ashaft, a third gear on said shaft meshing with the first-mentioned gear,a fourth gear on said shaft meshing with said second gear, meansslidably and rotatably journalling said shaft whereby said shaft may bedisplaced longitudinally relative to said third and said fourth gears,and clutch devices interposed between said shaft and said third gear andbetween said shaft and said fourth gear, said clutch devices beingresponsive to longitudinal movements of said shaft to render themfunctionally inoperative.

5.Appar`atus for unwinding a band from either of two spindles, or theequivalent, and

winding it upon the other, said apparatus comf prising a gear with whichone of said spindles is constrained to rotate, a second gear with whichthe other of said spindles is constrained to rotate, a shaft, a thirdgear on said shaft meshing with the iirst-mentioned gear, a fourth gearon said shaft meshing with said second gear, means slidably androtatably journalling said shaft whereby said shaft may be displacedlongitudinally relative to said third and said fourth gears, and clutchdevices interposed between said shaft and said third gear and betweensaid shaft and said fourth gear, said clutch devices being responsive tolongitudinal movements of said shaft to render them functionallyinoperative and said shaft and clutch devices having cooperatingportions operating, in one position of said shaft, to connect both thethird gear and the fourth gear to said shaft to rotate both the spindlessimultaneously to wind the ends of the band thereon.

6. Apparatus for unwinding a band from either of two spindles, or theequivalent, and Winding it upon the other, said apparatus comu prising agear with which one of said spindles is constrained to rotate, a secondgear with which the other of said spindles is constrained to rotate, ashaft, a third gear on said shaft meshing with the iirst-mentioned gear,a fourth gear on said shaft meshing with said second gear, meansslidably and rotatably journaling `said shaft whereby said shaft may bedisplaced longitudinally relative to said third and said fourth gears,and clutch devices interposed between said shaft and said third gear andbetween said shaft and said fourth gear, said. clutch devices beingresponsive to longitudinal movements of said shaft to render themfunctionally inoperative and said clutch devices being operative torotate either of said spindles selectively to wind the band thereon,said shaft being rotated in the same direction in each instance.

Apparatus for unwinding a band from either of two spindles, or theequivalent, and' winding it upon the other, said apparatus comprising agear with which one of said spindles is constrained to rotate, a secondgear with CJI which the other of said spindles is constrained to rotate,a shaft, a third gear on said shaft meshing with the first-mentionedgear, a fourth gear on said shaft meshing with said second gear, meansslidably and rotatably journalling said shaft whereby said shaft may bedisplaced longitudinally relative to said third and said fourth gears, ahandle for rotating said shaft, means for displacing said shaftlongitudinally, and clutch devices interposed between said shaft andsaid third gear and between said shaft and said fourth gear, said clutchdevices being responsive to longitudinal movements of said shaft torender them functionally inoperative.

8. Apparatus for unwinding a band from either of two spindles, or theequivalent, and winding it upon the other, said apparatus comprising agear with which one of said spindles is constrained to rotate, a secondgear with which the other of said spindles is constrained to rotate, ashaft, a third gear on said shaft meshing with the rst-mentioned gear, afourth gear on said shaft meshing with said second gear, means slidablyand rotatably journalling said shaft whereby said shaft may be displacedlongitudinally relative to said third and said fourth gears, a handlesplined on said shaft for rotating it, means for displacing said shaftlongitudinally, and clutch devices interposed between said shaft andsaid third gear and between said shaft and said fourth gear, said clutchdevices being responsive to longitudinal movements of said shaft torender them functionally inoperative.

9. Apparatus for unwinding a band from either of two spindles, or theequivalent, and winding it upon the other, said apparatus comprising agear with which one of said spindles is constrained to rotate, a secondgear with which the other of said spindles is constrained to rotate, ashaft, a third gear on said shaft meshing with the first-mentioned gear,a fourth gear on said shaft meshing with said second gear, meansslidably and rotatably journalling said shaft whereby said shaft may bedisposed longitudinally relative to said third and said fourth gears, ahandle for rotating said shaft and displacing it longitudinally, andclutch devices interposed between said shaft and said third gear andbetween said shaft and said fourth gear, said clutch devices beingresponsive to longitudinal movements of said shaft to render themfunctionally inoperative.

1C. Apparatus for unwinding a band from either of two spindles, or theequivalent, and winding it upon the other, said apparatus comprising agear with which one of said spindles is constrained to to rotate, asecond gear with which the other of said spindles is constrained torotate, a shaft, a third gear on said shaft meshing with thefirstmentioned gear, a fourth gear on said shaft meshwith said secondgear, means slidably and rotatably journalling said shaft whereby saidshaft may be displaced longitudinally relative to said third and saidfourth gears, clutch devices inter posed between said shaft and saidthird gear and between said shaft and said fourth gear, said clutchdevices being responsive to longitudinal movements of said shaft torender them functionally inoperative, and means for displacing one ofsaid clutch devices longitudinally of said shaft while said shaftremains in a xed position with respect to the first-mentioned gear.

l1. Apparatus for unwinding a band from either of two spindles, or theequivalent, and winding it upon the other, said apparatus comprising agear constrained to rotate with one of said spindles, a

second gear constrained to rotate with the other of said spindles, ashaft, a sleeve disposed around said shaft, a third gear fixed to saidsleeve and meshing with the first-mentioned gear, a fourth gear fixed tosaid shaft and meshing with said second gear, a ratchet with which saidsleeve is constrained to rotate, a second ratchet with which said shaftis constrained to rotate, a rotatable member, pawls carried by saidrotatable member and engageable with said ratchets, and means for 10controlling said pawls whereby either of said pawls may be helddisengaged from its associated ratchet.

l2. Apparatus for unwinding a band from either of two spindles, or theequivalent, and winding it upon the other, said apparatus comprising agear constrained to rotate with one of said spindles, a second gearconstrained to rotate with the other of said spindles, a shaft, a sleevedisposed around said shaft, a third gear fixed to said sleeve andmeshing with the first-mentioned gear, a fourth gear xed to said shaftand meshing with said second gear, a ratchet with which said sleeve isconstrained to rotate, a second ratchet with which said shaft isconstrained to rotate, a rotatable member, and pawls carried by saidrotatable member to simultaneously engage said ratchcts and drive saidsleeve and said shaft in the same direction, said gears operating towind the ends of said bands on said spindles when said shaft and saidsleeve are driven in the same direction.

13. Apparatus for unwinding a band from either of two spindles, or theequivalent, and winding it upon the other, said apparatus comprising agear with which one of said spindles is constrained to r rotate, asecond gear with which the other of said spindles is constrained torotate, a shaft, a third gear on said shaft meshing with thefirst-mentioned gear, a fourth gear on said shaft meshing with saidsecond gear, clutch devices interposed between said shaft and said thirdgear and between said shaft and said fourth gear, said clutch devicesbeing responsive to longitudinal movements of said shaft to render themfunctionally inoperative, and means slidably and rotatably journallingsaid shaft whereby said shaft may be displaced longitudinally into anyone of three predetermined positions.

14. Apparatus for winding a band from one of two spindles, or theequivalent, and winding it upon the other, said apparatus comprising arotatable member, means operatively connecting said rotatable member toone of said spindles to wind the band thereon when said rotatable memberis rotated in a predeterrm'ned direction, and 55 means operativelyconnecting said rotatable member to the other of said spindles andco-operating with the first-mentioned means and said rotatable member torotate the spindles in opposite directions simultaneously to stretchsaid band.

15. Apparatus for winding a band from one of two spindles, or theequivalent, and winding it upon the other, said apparatus comprising arotatable member, means operatively connecting said rotatable member toone of said spindles to wind the band thereon when said rotatable memberis rotated in a predetermined direction, and means connecting saidrotatable member to the other of said spindles and co-operating withsaid first-mentioned means and said rotatable member, when saidrotatable member is rotated in said predetermined direction, to rotatethe spindles in opposite directions simultaneously to stretch said band.

16. Apparatus for winding a band from one of two spindles, or theequivalent, and winding it upon the other, said apparatus comprising agear with which one of said spindles is constrained to rotate, a secondgear with which the other of said spindles is constrained to rotate, athird gear meshing with the iirst-mentioned gear, a fourth gear meshingwith said second gear, and means for simultaneously rotating said gearsto rotate the spindles in opposite directions whereby said band will bedrawn taut between the spindles.

17. Apparatus for winding a band from one of two spindles, or theequivalent, and winding it upon the other, said apparatus comprising agear with which one of said spindles is constrained to rotate, a secondgear with which the other of said spindles is constrained to rotate, athird gear meshing with the first-mentioned gear, a fourth gear meshingwith said second gear, and means meshing with the first-mentioned gear,a fourth 10 gear meshing with said second gear, and means including ashaft and clutch devices for rotating said third gear and said fourthgear to rotate said spindles in opposite directions whereby said bandwill be drawn taut between said spindles.

CECIL C. MCCAIN. JOHN W. HERNLUND.

